Media

In the IESO's Media Centre, reporters will find timely and relevant information about the IESO, Ontario's power system and the wholesale electricity market. For media inquiries, please contact 416.506.2823 or media@ieso.ca.

Overview

The IESO manages the province's power system so that Ontarians receive power when and where they need it. It plans and prepares for future electricity needs, and works with its partners to guide conservation efforts. A not-for-profit entity established by the Government of Ontario, IESO fees and licences to operate are set by the Ontario Energy Board.

Electricity Data Fast Facts

Ontario's peak energy use is typically in the summer months when people use air conditioners to beat the heat. Peaks also take place in the winter when the weather is especially cold. Weather has the biggest influence on electricity demand.

Consumers Served

4.9 million

Transmission Lines

30,000 km

Ontario Import Capability

4,500-5,200 MW

IESO Wholesale Market

$17 billion in financial transactions per year

Average Weighted Wholesale Market Price (2017)

1.58¢/kWh

Global Adjustment Class B Rate (2017)

9.97¢/kWh

Total Annual Energy Consumed (2017)

132.1 TWh

Conservation Results 2016

In 2016, Ontarians achieved 1,267 gigawatts (GWh), or 1.267 TWh of energy savings ̶ for a combined total of 2,810 GWh, or 2.81 TWh, from 2015 and 2016, persisting to 2020.

1 Gigawatt hour (GWh) = 1 million kWh

1 Terawatt hour (TWh) = 1,000 GWh

Energy Output by Fuel Type 2006 vs 2017

Notes: Most solar facilities are connected to distribution systems, not the transmission system.Due to rounding, percentages may not add to 100.

What is 1 kWh?

A cyclist exerts an equivalent of 1 kWh of electricity when biking from London to Guelph. See more at www.1kwh.ca.